Coiling head assembly



g Jan. 26, 1954 G. H. JAYcox COILING HEAD ASSEMBLY Filed March 29', 1952 2 Sheets-Sheet l y l| yin 50 a" 65 ig :if yy 79 ,M l lNvENToR yg i H. .fm/C04.

ATTORNEY f Jan. 26, 1954 G. H. JAYcoX COILING HEAD ASSEMBLY 2 Sheecs-Shee'rI 2 Filed March 29, 1952 V INVENTOR. JT /f JW V60/Y 3% firme/Wsw Patented Jan. 26, 1954 COILING: HEAD ASSEMBLY:

Gordon HQ Ja'ycox,n Pssaim. Ni Jij. assigner: to Westinghouse Electric Corporation; Ez`li'st-'Ptts"frb'urgh; Paf., af corporation of Pennsylvania ApplicationMarch-ZSL 1952,Seria;l No. 279,307

Thepr'esentinvention .relates to a machine for winding" primary" coils for incandescent, lamps coil-winding machine, revolving at 800GB. P; M.,

neither ofthe abovementioned/methods are effective; Again, anelectric'currentwas passed" through the wireitself'toA pre-heatit before 'wind-v ing. However, this methoddid not provide Vuniform'fheat in the wire because the low tension thereon does'V not provide'a' good. electricalc'ontact;

Hence; itY has been found' advantageous; accord; ing=to =my invention; tov provi'deaI coil'winding machine with an electrically heated bridge pin for heating* the Wirefto be wound) byconduction, before winding said wire on the primary mandrelf The bridge pin of` my invention is'electricall'y' heated" byv a' currenty which` is'A picked up" bythe slip rings on the' rotatinghead ofthe' coil-wir'fdi'n'gv machine and it alsoadjusts and"controlstheV winding 'of 'the'fcoilj A compression spring .ir'rba'cli4 of'the mandrel die holdsthefilamentiwire against' the heated'lori'olflgrel pin-at thelpoint of winding so' that-theheatfromthe pin is= transmitted to the lament wir'e tobe' wound "by conduction and 'i radiation at "'tliepointof winding.

In. it'scgenerall aspect; theA present* invention' has as `-its` obj ctivei the-avoidance off the defectsy of` the '-pri'orart'methods-'and` apparatus for'fheati ing the lament wire to be wound'lon'acoil-'windi ing machine? Another object is an electrically heated bridge pin for' a' coilwinding machine which transmits heat to the l-'am'ent-wiref-byconductionand radiation at :the point of winding..

Aafurthenobi ect is an.electricallylieatedbridg pin for a coil-winding. machine? which redricesfV wire .rejectonsio an absoluteminimum, irncrea'sesfi coil-winding: eciency, and'v decreases filament?` coil.. shrinkage:

Other obj ectsand .advantages ofthe invention will become apparent to those skilled in the art to whi'chfit pertains as the-"description proceeds:

Referringl" to4 the accompanying: drawings? in which like numerals of reference designate similar parts throughout the several views:

Fig. 1 isia'verticalsectionalview, with parts'in elevation; of a". csailingl-headL assemblyv of a" coilwinding machine embodyingmy invention;

Fig; 2 is' an. enlarged" end' elevational' view o the coilingh'ead' assemblyof 1, inthedirection `of th'e'arrows on the'lineII-II of'lig. 1;

Fig.' 3 is 'adetailed'sectional'view of the'mandrel and electrically heated" bridge pin of myv vinvention, on tlelineIIIL-IIIiofiFig.' 23 inthe direction ofthearrows Fig. it isa' perspective. View" of the" electrically heated bridge pint Referring'to'the drawing, and more particularly'to'Fi'g.' 1', a coiling-lieadassembly is designatedbythereference numeral Ii This assembly 'has a"ho1low'coi1ingj head *shaft or spindle' i2 whichrotatesina suitable"bushing"in` a pedestal I4; Onv one end"` of "thesliaft I2, rsuitably near the pedestal, a' collector ring IB and a'means for rotatingsaid shaft; suchas a-spindle'pulley IE, arekey`ed'-'to"the' shaft and' h'eldI thereon as by suitable nuts. AdiacentftlfeV other side ofthe estal, a: second vcollectorring"2'll 'is' suitably aihxed againsta` spindle fly-wheel `22lby a-bolt 23, which threads into'a retainingfplateld': The iiy wheel 22" is similarlykeyed to the-shaft |21 An appropriate bushing' 25, aiwasher 28, and' a screw'busliing'kBof insulating" material insulate thev commutator 2i! from theiretainingplatefZA' and the spindle 7fly Wheel" 22;'

This@ fry wheel* 22'? is* provided with an axiallyextendingiyoke 32, ofageneral'H-like conguration, and having axialIyLexten'd-i-ng wire guide arm 34', terminal post'tub'ingf arm 3&2; and a radiallyeextendin'gfcenter portion 38. On a bobbin between thee-flywheel222 andthe center portion 3810i theyoke32, isa' Wire'spool 40, carrying lament wire-4I. Onithe'wiregnideextension arm4v 34 fof' thefyok'ef? two rotatablewire =guide rollers 52: and"54are provided frsaid "-lamentwire M a The; right hand'endiofth'e spindle when `viewed "in :Fig: 1, isslidable-"or retractable for re- 'bobbin 49 in 'a*stationary-y center portion isq ariiizedE to the center'4 portion 3S 'l of placing.: 42- wh hasfa-n-anrmlar` abutment portion 152* ior-'com-- pressing al die' holder springfasr hereinaftert4 exeplained. This assembly'-43co1nprisesadief; suitably non-condoeting` sapphire; and a" die holder 46;* suitablyfattaoliedj asby threading; to the center'portionV 421 byfaIA coiling heafd .nose 8.

This nese48 liasfaelwer center lng 481 provided witlia threadedili'olefor'adjdstablymounting al bridges-pin assembly; ofi myfinvention* herein@ after explained. A non-rotatable mandrel 50 axially extending beyond the length of the coiling 3 head shaft I2, is laterally reciprocable through the die holder 46 and the die 44 by means (not shown).

Two brushes 56 and 58 mounted by means of suitable brackets from the pedestal I4 are in slidable engagement with the collector rings I6 and 20, respectively. Within the terminal post tubing arm 36, a terminal post 60, suitably insulated therefrom, (as by an insulating sleeve) is secured therein by means of an insulated contact bolt, and connected by a lead 62 to a second contact bolt which threads into Vthecornmutator 20, and is appropriately insulated by means of a bushing 63 from the spindle fly wheel 22.

Referring now to Figs. 2 and 3, the bridge pin assembly 64, of my invention, comprises a bridge pin holder 61, pivotally mounted by means of bolts S'I on a pair of generally L-shaped extension arms 68 and 'I0 projecting from said coiling head nose with their' normally elongated sides horizontal, a bridge pin 12, and a bridge pin sup-- port 'I4 insulated fromand carried by the holder 6l. A bolt 65 extends through a clearance hole in the holder 61 to permit slight pivotable moyement of the holder 51 and threads into the lug 48 on the nose 48. A spring 69 onftne bolt G5 extends between the lug 43 and the holder 6l. As shown in Fig. 2, one end` of the bridge pin l2 is secured in a laterally extending groove in the upper surface of a side. extension 'i6 of the holder 61 by a suitable screw TI. The other end of said pin is similarly secured in the bridge pin support 14, which is similar in shape to extern sion 16 and suitably insulated from the bridge pin holder l by means of mica-washers i9. The support 'i4 is held thereto by means or a pair of screws 8l, also suitably insulated by mica-bushings i9 from the body of the bridge pin holder 5l. A lead 'i8 connects the bridge pin support 'i4 to the terminal post 60 of the terminal post tubing 36. It will be understood that the bridge pin holder is suitably pivoted on the estension arms 68 and 10, to allow for employment of the bridge pin 'I2 with a large assortment oi mandrel sizes. The bridge pin is disposed above, close to, but not in contact with said mandrel Wire 4I from the spool is fed over the wire guide rollers 52 and 54 into contact with the bridge pin I2 and thence into engagement with the mandrel. la compression spring 83 between die holder and the abutment portion 42 of the center portion 42 pushes the die holder 45 and the non-conduct* ing die 44 forward against the wire 4 I, thus pressing the wire 4I against the bridge pin 12.

Current is supplied from a lead 80 through the brush 56 and the collector ring I6, along the shaft I2 through the fly wheel 22, wire guide extension arm 34, die holder assembly 42, bridge pin holder 61, and thence to the left end of the bridge pin 'I2 (when viewed in Fig. 2). A lead-in conductor 82 connects the other side of the power supply line to the other brush 58 and the collector ring through lead G2, terminal post Bil, and lead 18 to the bridge pin holder support 'I4 and the other side of the bridge pin l2, thus completing the circuit and permitting the resistance heating of the bridge pin.

coil 84 is wound on the mandrel 50 which simultaneously moves through the die 44 of the die holder assembly 43. By heating the wire 4I, immediately prior to winding, and the mandrel adjacent to the bridge pin 12 by conduction and radiation from the bridge pin 12, the coil 84 is Wound on said mandrel While suiiiciently heated to avoid breakage.

Thus it will be seen from the foregoing description that the present invention has provided a bridge pin assembly 64 for a coiling head assembly I0 of a coiling machine which eliminates the defects and disadvantages of the prior art methods and apparatus for heating the lamen- 'tary Wire 4I immediately prior to winding. I have provided an electrically-heated bridge pin `I2 which transmits heat to the filament wire 4I and to the mandrel 50, by conduction and radia tion at the point of winding. This electricallyheated bridge pin reduces wire rejections to an absolute minimum, increases efficiency, and decreases llament coil shrinkage. The compression spring `83 in back of the die holder 45 and According to my invention, one end of the wire 4I is ailixed to the mandrel '50 and the wire 4I is maintained in contact with the electricallyheated bridge pin 'I2 by the springs 66 and 83. As the coiling head assembly- 0 rotates at a high speed, in the neighborhood of 8000 R.. P. M., a

the spring 66 on the adjustment bolt E5 of the holder 61 automatically maintain the 'filament wire 4l against the bridge pin 'l2 at the point of winding.

Although an embodiment of my invention has been disclosed, it will be understood that modifications may occur to those skilled in the art.

I claim:

l. In combination a coiling head assembly for providing one side of a bridge pin as embly supply circuit comprising at least a coiling head spindle, a collector ring and a fly-wheel on said spindle, a wire guide extension arm on said ilywheel, a die holder assembly on said extension arm and the other side of said circuit comprising a second collector ring on and insulated from said spindle and means for connecting said second ring to a bridge pin assembly, and an electrically heated bridge pin assembly on said die holder assembly.

2. In combination a coiling head assembly for providing one side of a bridge pin assembly supply circuit comprising at least a coiling head spindle, a collector ring and a fly-Wheel on said spindle, a wire guide extension arm on said liiywheel, a die holder assembly on said extensionr arm and the other side of said circuit comprising a second collector ring on and insulated from said spindle and means for connecting said second ring to a bridge pin assembly, and an electrically heated bridge pin assembly on said die holder assembly, said bridge pin assembly comprising a pivoted bridge pin holder, a bridge pin support on said holder and insulated therefrom and a bridge pin extending between said holder and said support.

GORDON H. JAYCOX.

References Cited inthe me` oftnis patent UNITED STATES PATENTS Number Name Date 1,496,356 Noonan June 3, 1924 2,101,382 Donovan Dec. 7, 1937 2,162,498 Beebe June 13, 1939 2,163,565 Thomas June 20, 1939 2,458,789 Marter Jan. 1l, 1949 FOREIGN PATENTS Number Country Date 228,132 Great Britain Jan. 2, 1925 

